PCF8583_REG_WKDYMON
PCF8583_REG_WKDYMON,
dt->dt_mon = bcdtobin(bcd[PCF8583_REG_WKDYMON] & PCF8583_MON_MASK);
bcd[PCF8583_REG_WKDYMON] = bintobcd(dt->dt_mon) |